Feeding and Growth of Larval Greater Amberjack <I>Seriola dumerili</I> with Non-inflated, Normal Inflated and Over-inflated Swim Bladders

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  • Hashimoto Hiroshi
    Shibushi Laboratory, National Research Institute of Aquaculture, Fisheries Research Agency
  • Imai Akihiko
    Department of Marine Biosciences, Tokyo University of Marine Science and Technology
  • Iwasaki Takashi
    Kamiura Laboratory, National Research Institute of Aquaculture, Fisheries Research Agency
  • Hamasaki Katsuyuki
    Department of Marine Biosciences, Tokyo University of Marine Science and Technology
  • Teruya Kazuhisa
    Yaeyama Laboratory, Seikai National Fisheries Research Institute, Fisheries Research Agency
  • Hamada Kazuhisa
    Komame Laboratory, National Research Institute of Aquaculture, Fisheries Research Agency
  • Mushiake Keiichi
    Seikai National Fisheries Research Institute, Fisheries Research Agency

Bibliographic Information

Other Title
  • 鰾の開腔状態が異なるカンパチ仔魚の摂餌と成長
  • ヒョウ ノ カイコウジョウタイ ガ コトナル カンパチシギョ ノ セツジ ト セイチョウ

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Description

To elucidate the feeding and growth of larval greater amberjack Seriola dumerili with non-inflated, normal inflated and over-inflated swim bladders, we measured the total length, swim bladder volume and number of rotifers in the gut of larvae reared in small tanks of 500 l volume and large tanks of 80 kl volume. Anesthetize larvae with inflated swim bladders were introduced into the beaker containing the seawater (25°C; mean specific gravity, 1.0266); then, larvae surfaced (floating larvae) and those sunk or showed neutral buoyancy (larvae with normal inflated swim bladders) in the beaker was separated. Proportion of larvae with inflated swim bladders showed ~70-100%. Floating larvae were detected from 6-7 days after hatching in both small and large tanks, and their proportion to the total number of larvae with inflated swim bladders reached ~40% on average in large tanks. Swim bladder volume of floating larvae was significantly larger than that of larvae with normal inflated swim bladders, i.e., floating larvae had over-inflated swim bladders. Feeding and growth of larvae with non-inflated and over-inflated swim bladders was inferior to those of larvae with normal inflated swim bladders.

Journal

  • Aquaculture Science

    Aquaculture Science 60 (1), 99-106, 2012

    Japanese Society for Aquaculture Science

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